Display screen or portion thereof with a graphical user interface for analytics



FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface for analytics showing the new design.

The outermost broken line perimeter illustrates the display screen or portion thereof and the broken lines within the outermost perimeter illustrates portions of the graphical user interface. All subject matter shown in broken lines in the drawings, including the matter depicted in heavy broken lines, illustrate portions of the article and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface for analytics, as shown and described. 